Type-bar-tension-adjusting means.



E B. MSS.

TYPE BAR HNSQON ADUSTHJG ME'JS.

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lw@ ik Fammi Sew 25,1917.

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t lslilllleallll @WATTS EDWARD E. HESS, OF BROOKLYN, NEW YORK, ASSGNOR TO ROYAL TYPEWRITER COM- PANY, ENG, GF NEW YORK, N. Y., A CORPORATION OF NEVI YORK.

Application filed May 10, 1917.

To all fil/imm t may concern.:

Re it known that I, EDWARD B. Huss, a citizen ol' the United States, and a resident ot the borough ot Brooklyn, in the city of New York, county ot Kings, and State of New York, have invented certain new and nsetul improvements in Typedar-Tension- Adjusting Means, of which the following is a specification.

The present invention relates generally to typmvriting machines and has more part-icularly reference to means for adjusting the tension under which the type-liars are heldr in their inactive position.

ln the Hess and Myers Patent No. 1 ,212,9'1L7 there is disclosed a construction of typewriter in which the type-bars are connected to a universal har hy means ot a suitahle link. Surrounding each link is a tension spring which isl attached at one end to a memher connected to the type-bar and at its other end to a trame pivotally supported in the casing of the machine. This frame has an adjustable plate at its upper 'tree end which receives the springs and has at its lower free end a hushino' for the reception of an adjusting screw which latter ahuts against the rear wall of the casing, so that, ley turning the screw, the frame is swung. on its pivots and the tension of all the springs of the type-hars is adjusted. In view of the fact that these parts are located within the casing of the machine, they are not accessihle from the exterior thereof, and, in order to make the adjustment, it is necessary to reach up inside the casing from beneath the same. As is well known, typewriting machines are usually fastened to the table or desk on which they are supported, and` in order to vary the tension of the springs of the type bars, it is necessary to remove thefastening means for whole in order that proper access may he gained to the bars. Naturally, the removal and replacement of the 'fastening means of the machine as a whole occupies an undue amount of time of the repair man and it isy the object of this invention .to ohviate this difiiculty and to enable the springs of all the) type-hars to be adjusted in unison Without the necessity' of removing the machine from.

its support.

The invention comprises essentially a con struction whereby detachable means, ere tending through the rear Wall of the casing, may. be utilized for the purpose of adjust.

which is hent and the machine es a Specification of Letters Patent. Patented Sept 25, 1911.7

Serial No. 167,542.

ing the trame, within the casing, on its pivotal supports; I

In the accompanyingdrawings is shown a portion ot a typcwriting machine similar to the disclosure ot' Patent No. 1,212,947, hut to avoid mere repetition of parts already known only the'elemcnts immediately adjacent to the adjusting frame are shown.

Figure 1 is a vertical sectional view through the rear portion of a typewriting machine showing the end of the type-bar system and the connections therefrom to the universal har and to the adjusting frame.

Fig. Q is a vertical sectional view on the line Q--Q ot' Fig. 1, looking in the direction ot the arrows.

2 indicates the type bars, pivotally supported at 4 in a known manner, and each actuated through the link leading to the key levers.r preferably in the manner disclosed insaid lPatent No. 1,212.47. 6 is the universal har to which link 5 is connected hy means ot the intermediate link 7 the rear end 8 oi' which is bent' to engage the said universal har 6. Surrounding the intermediate link 7 is a tension spring 9, one end 1l) oi which is secured to a member 11 car ried hy the link 5, and the other end 12 of passes througha suitable opening in the plate lt will, ot course, he understood that theinvcntion Contemplates the use of a tull set of type-bars for the key lever mechanism and that there will he a nnniher ot intermediate links 7 and springs 9, equal to the number of type-bars used. Said springs 9, however, will lall he connected to the plate 13 as fully described in said Patent No. 1,212,947. The plate 13 is adjustably secured to the upper tree end of the frame 1-1. A' convenient means for adjusting the said plate 13 with respect to the frame 14 consists. in the set-screws 15 which pass through slots 16 in the plate 13 and into the upper end of the trame 14.- It

.will loe understood ythatv by loosening the The frame 14 is pivotally supported frame 14 is intermediate its upper and lower ends. The lower end 20 of frame 14 1s in the form of a bushing for the reception ofA the adjusting screw or member 21. On the outer end of this member 21 there is a convex head 22 of relatively large size and this convex head is in engagement with a concave surface 23 surrounding an aperture'24 which extends through the rear wall of the casing from the exterior thereof. The said convex head 22 is provided with kerfs 25 of suitable number, while the inner end of the screw 21 is provided with a knurled knob 26 by means of which it may be adjusted. 28 indicates a key or a wrench which may be inserted from the exterior'of the rear wall of the easing through the aperture 24 and into engagement with one of the kerfs 25 ofthe convex head 22. It will be understood that by means of the key or wrench 28 the adjusting member 21 may be turned and when so turned the distance between the lower end 20 of the frame 14 and the rear wall of the casing will be varied, with the result that the upper end of the frame 14 is moved to vary the tension of all the springs 9 simultaneously. The rocking movement of the frame 14 will, of course, carry the member 21 with it and the convex head 22 thereof will slide on the concave surface 23. In order to permit the adjustment to take place throughout a relatively wide range of movement, the convex head 22 is of relatively large size so that it will always engage with the concave surface 23 and will always present a kerf in line with the, aperture 24 to permit of adjustment thereof by means of the detachable wrench or key. 28.

It will be understood that the convex head 22 and the concave face 23 constitute in effect a ball and socket joint and that means for rotatively adjusting the ball extend through the socket.

1. In a typewriting machine, a casing, a frame, controlling the tension of the springs of the type-bars, pivotally supported within the casing andhaving a member abutting against the rear wall thereof under tension of the springs, and detachable means extending .through the r-ear wall of the casing from the exterior thereof for adjusting the position of the frame with respect to the casing to vary the tension ofthe springs.

2. In 'a typewriting machine, a casing having an aperture in its rear wall, a franie, controlling the tension ol' the springs of the type-bars, j'iivotally. supported within the casing and having a portion abutting the rear wall of the casing in line with the aperture thereof, and detael'lable means extending through said aperture from the exterior of said casing i'or adjusting the position of the frame with respect to the casing to vary the tension of the springs. v

3. In a typewriting machine, a casing whose rear wall is provided with an aperture extendingthrough said wall, said aperture terminating on the inside of the rear wall in a concave bearing surface surrounding the aperture, a frame, controlling the tension of the springs of the type-bars, pivotally supported within the casing at a point between its upper and lower ends so that the lower endthereof is normally urged toward the rear wall of the casing under the tension of the springs, an adjustable member in said frame having a convex head in engagement with the concavityv of the rear wall, and means extending through said aperture for adjusting said member in the frame to thereby turn the frame on its pivot to vary the tension of the springs.

In a typewriting machine, a casing, a frame pivotally supported, within the easing and adjacent to the rear Wall thereof, at a point intermediate its upper and lower end, type-bar, springs connected tothe upper end of the frame, a rotatably adjustable member carried by the lower end of the frame and abutting against the rear wall of the casing, complementary surfaces on said member and rear wall. constituting a ball and socket joint, and means extending through the rear wall of the casing from the exterior thereof and in the plane of the ball and socket joint for rotatably adjusting the member.

5. In a typewriting machine, a casing, a frame pivotally supported, within the easing and adjacent to the rear wall thereof at a point intermediate its upper and lower end,

type-bar springs connected to the upper end of the frame, a rotatably adjustable member carried by the lower end ofthe frame and abutting against the rear wall of the casing, complementary surfaces on said member and rear. wall` constituting a ball and socket joint, and detachable means extending through the rear wall ofthel casing from the exterior' thereof and in the plane of the ball and socket joint for rotatablymember.

6. In a typewriting machine a casing, a frame, controlling the tension of the springs of the type bars, pivotally supported within the casing, an adjusting screw or member for the frame, and detachable means extending through the rear of the casing from' the exterior thereof for additionally adjusting the position ot' the frame and thereby varying the tension of the springs.

Signed at New York city, in the county of New York and State of New York, this 8th day of May 1917. A

EDWARD B. HESS.

adjusting the It is hereby certified that in Letters Patent N o. 1,241,214, granted September' 25,

1917, upon the application of Edward B. Hess, of Brooklyn, New York, lfor an vimprovement in Type-Bar-Adjusting Means, an error appears in the printed-A specication requiring correction as follows: Page 2, lineq88. claiin 4,'after the compound Word type-bard strike out the comma; and 'that the said Letters Patent shonld be read Withthis correction therein thatl the same may conform to the record of the case in the Patent Office,

Signed and sealed this 20th da).7 of November, A. D., 1917. l {mn} R. F. WHITEHEAD,

, `Acting Commissioner of Patents, Cl. 197-33. 

